In this proposal, we plan to explore the possibility of developing a non-invasive H-isotopes quantification method based on Deep Inelastic Neuron Scattering (DINS) to be applied to the post-mortem analysis of tokamak tiles. Due to their "sensitivity" to H nuclei, neutron show interesting characteristics (mainly non-invasivity) for diagnosis of H retention in solid materials: indeed the area over the scattering peaks due to H (and D) is proportional to their total amount in the sample. The consequent estimation of total amount of hydrogen isotopes in the sample is thus straightforward.